Multiplication (multi-digit)

Practice 3 items →

Fluency chapter. The interesting part is decomposition (48 × 25 = 12 × 100). Students multiply 3- and 4-digit numbers by 2- and 3-digit numbers, estimate, and catch an impossible product.

Specification · for a parent or teacher

Part no.: multi-digit-multiplication-5
Course: Advanced Math 5 · Unit 4
Realm: Foundations
Difficulty: 2 of 4 — Grade 4–5. Two steps, or one idea in a story.
Qty: 3 items

Part no. is the node's id; the realm is the kind of math; qty is how many practice items it carries.

Students can

multiply 3- and 4-digit by 2- and 3-digit; estimate; catch an impossible product.

Ready when

$48 \times 25$ mentally as 1,200, then $148 \times 25$ (3,700) on paper as a 3-digit × 2-digit.

Watch for

a 3-digit × 3-digit product with four digits and no comment.

Before · requires

Multiplicationmulti-digit-multiplication · Math 4

After · used by

Division (2-digit divisors)two-digit-division · Math 5

Print this set Open on map